Curtain-shutter.



No. 762,424. PATENTED JUNE 14, 1904. H. W. LOGKE. CURTAIN SHUTTER.

APPLICATION FILED DBO. 23, 1903.

'UNITED STATES CAMERA COMPANY, OF ROCHEST NEW YORK.

` Patented June 14, 1904.

PATENT OFFICE.

HARVEY W. LOCKE, OF ROCHESTER, NEW YORK, ASSIGNORTO CENTURY i ER, NEWYORK, A CORPORATION OF CURTAIN-SHUTTEFK.

SPECIFICATION forming part of Letters Patent No.Y 762,424, dated J u ne14, 1904.

Application filed December Z3, 1903. Serial No. 186,365. (No model.)

I To ali/. 111710111- ft 11m/1j concern,.-

Be it known that I, HARVEY W. Locxn, a citizen of the United States, anda resident of Rochester, in the county of Monroe and State of New York,have invented certain new and useful Improvements in Curtain-Shutters,of which the following is a specification.

This invention relates to curtain-shutters y adapted, preferably, foruse in the focal plane of cameras.

It consists in the mechanism hereinafter described and claimed.

/ln the drawings, Figure 1 is an elevation, pitly in section, of amechanism embodying the invention. 2 2 of Fig. 1. 3 3 of Fig. 1; andFigs. 4, 5, 6, 7, and 8 are views of details.

In the drawings,l 1 1 arey the top and bottom rails ofthe rectangularframe for the shutter. 2 and 3 are the vertical side rails thereof.Within this frame are supported four rollers foroperating two iiexibleblinds.V One blind, 4, is rolled upon and unrolled from a roller 5 andhas narrow bands 6 and 7 attached to its outer corners that are rolledupon an automatic spring-roller 8 in the lower part of the frame.-Theother blind,'9,is rolled Jpon and unrolled from an automaticspringroller 10 in thelower part of the case and has nar-- row bands 11and 12 attached to its outer corners that are rolled upon a roller 13 inthe upper part of the frame. Mechanism is provided for operatingftherollers, and vthereby the blinds. v

The principle of the mechanism thus far described is as follows: If'theblind 4 remains stationary and the roller 13 is turned in one directionor the other, thereby moving the blind 9, the exposure-gap between theedges 14 and 15 of Ithe blinds 4 and 9 can he enlarged Aor diminished.The spring-rollers 8 and 1() if they have been put under suicienttension will move the blinds 4 and 9 simultaneously, since they aregeared together,.

Fig. 2 is a section on the line Fig. 3 is a section on the linethe lowerportion of the shutter-opening,

thereby exposing the plate. f If the tension ot'- either or both of thesprings in the blinds 4 and 9 is increased or diminished, the speed ofmovement ot' the exposure-gap is correspondingly changed. When therollers 13 and 5 wind, respectively, the bands 11 and 12 of the blind 9and the blind 4 to the upper part of the casing, the device is ready foruse,

If, then, the roller 13 is released while the roller 5 is held fixed,the blind 9 will be rolled upon the roller 10, so-that the shutter willbe openedwide.v If next the roller5isreleased, the blind 4 will bepulled toward the roller 8, so that the opening will-be closed. The timebetween the release of the roller 13 and the release of the roller 5will determine the length of this time exposure.

'The operating mechanism of this shutter is as follows: The roller 13has a shaft 16, carrying a pinion that meshes with a second pinion 18,which latter pinion meshes with a pinion 19, Fig. 1, on-the shaft 2() ofthe roller 5. These shafts and pinions are supported on a plate 21,attached to the shutter-frame. The

shaft 20 carries also aratchet-disk 22 for en-A gagement with aspring-operated dog 23, pivoted on the plate 21 and actuated in onedirection by a spring 24 and in the other direction by the plunger 25 ofan' air-engine that is controlled in the usual way by a bulb 26. Theshaft 16 passes through aperforation in the plate 21 of such size thatit permits the movement of the shaft far enough to disengage the teethof the pinion 17 from the teeth of the pinion 18, and the end of theshaft 16 rests in a movable plate 27 pivoted at 28v to the plate 21. andprovided with means for limiting its movement, such as the pin 29movable in a roller or slot in the plate 21. The movable plate 27 mayhave a 'handle 30 and is moved in the direction to maintain engagementbetween the pinions 17 and 18 by means of a spring 31. I

` The spring-rollers 8 and 1() are of wellknown construction, at leastin so far as each roller is hollow, and has a spring 32 attached to theroller and to a stationary shaft on which the rollerfturns, so that byrevolvmg' the roller itself withl reference to -the shaft the spring 32is wound up and put under ten.

- sion-for operation. The roller-8 has a shaft 33, which at one endcarries a pinion 34, that mesheswith a pinion 35 and which in turnmeshes with a pinion 36`Iupon the shaft 37 of the roller 10. j Eitherthe shaft 33 or the shaft 37 has upon it-a milled head 38 for turning it.1o in order to increase the tension of the springs 32 ofl the tworollers. Said milled head is held by means .of aV split ring. 39,fastened to -the plate 40, which is the plate that constif tutes thebearing for the shafts 33 and 37 and I5 qcarries the pinion 35. Thesplit ring 39 has lts free end bent out from the plane of the remainderof the ring, so that said 'end may engage in notchesV on fthe milledhead 38. As the milledhead 38 is turnedso that it winds up. the spring32v the freeend of the ring 39 engages in the successive notches'in the.head 38, thereby preventingthe unwinding of the spring, and since .theshafts 37 and 33 are geared together as just described both springs arewound up in the same direction. When the free end of the ring 39 ispressed in, it is released from the head 38, so that the tension- L o fthe-spring 32 may belet down. The opposite end of the shaft 33 carries asmall pinion 41, that engages a disk 42, pivoted to'turn an axis 43 on-aplate 44 on the outside of the frame. The disk 42 has numerals arrangedaround its periphery, and the .position of said as the pinion 41,indicates the tension'of the spring 32.

.- on the end of nagaan 161s a mined had 45 for operating said 'shaftandalso a'disk 46, carrying numerals upon its edge. Theend of 49 theshaft 20 carries a'disk 47 adjacent'to the lowing the blind 9 to bevwound to a suitable. A degree upon the roller 10 bythis'action of thespring in theroller 10 the exposure-opening bctweenfthe'edges 14 and 15isv increased and by. turning the milled' head in the oppositedirec'tion it isdiminished. The marker on the I 6 disk 47 should pointupward, so that it will .indicate the Vwidth-of the exposure-opening vby reference to the proper numeral on -the disk46.

ljor instantaneous .exposures the shutters 4v65 are Vipintedfbymere ly3Y pressing the bulb,

numerals with referenceto a fixed'point, such',

disk 46 and is 'provided with a marker or- Thus the roller 13isfrendered free to which causes the plunger 25 of the air-engine todisengage the dog 23 from the ratchet-disk 22 on the shaft 20, therebyreleasing the spring rollers 8 and 10, so that they wind up,'respectively, the bands and 7, attached to the blind 4 and the blind 9.For time exposures the blinds 4 and 9 lare released," so4 that they are-drawn successively across the 'shutter-opening. To accomplish this, thelmovable'plate 27 is first tilted by'its handle 30, thereby releasingthe shaft 16, so that the spring-roller` -10 will pull -down the outerblind 9 and expose the plate. Then to close the blind tilt irst thelever, as before, thereby disengaging the roller 5 from the roller 13,and then press 3Q the bulb, thereby releasing the shaft 20 of the roller5 from the dog 23, so that the springroll 8 is free to pull down the'other blind 4, thereby`cornpleting the exposure.

What 1 claim is.-' l 1. The combination of a frame; a'pair of adjacentspring.- rollers, supported in said frame; means for adjusting thetension of the springs in said springrollers;'a-flexible blind wound onone of said'spring-rllers; a pair of flexible bands, wound on theother'of said spring-rollers; a pair of adjacent rollers at a suitabledistance from saidspring-,rol-lers, also supported in' said frame; asecond flexible blind wound on one of said last-mentioned rollers andconnected to the bands thatare wound on', one of said spring-rillers;A asecond pair of exible bands wound on theother of the two last-mentionedrollers and connected to the blind that is wound on nenof saidspring-rollr ers; a gearing connecti n between the other two rollers;mean-s for locking one of said last-mentioned rollersagainst rotation;means for releasing said last-mentioned roller from said locking meansfor releasing both blinds; and means' for disconnectingsaid gearingconnection for releasing one of 'said blinds for the purpose ofadjusting the width of the open- -ing'between'the edges of said blinds.

I 2. The combination of a frame; a pairof adjacent spring rollerssupported in said frame; means for adjusting the tension of the springs`in said rollers; a flexible blind wound on one of said spring-rollers;a pair .of ilexi- 'ble bands wound on the other of saidspringrollers;..a plate pivotally supported on 'one side of said frame;-a pair of adjacent rollers at a suitable distance from saidspring-rollers, oneo which is supportedat both ends in said frame andthe other of which is supported at 1 2 one end in'said frame and at the-other end in said plate; Va second iiexible blind' wound on one ofsaidlast-mentionedurollers and connetedmo the bands thatare woundon one ofsaid spring-rollers; a second pair ofl flexible bands wound on the otherof the two last'- mentioned rollers and connected to the blind that iswound on one of said spring-rollers; a

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.- gearing connection "between the other two rollers; means for vlockingagainst rotation 13 that one ot' said last-mentioned rollers that issupported at both ends in said frame; means for releasing saidlast-mentioned roller from said locking means for releasing both blinds;and means for tilting said pi votally-supported plate whereby thegearing connection between said last -mentioned rollers is disconnectedfor the purpose of adjusting the width of the opening between the edgesof said blinds.

3.- The combination of a frame; a pair of adjacentv spring rollerssupported in said frame; means for adjusting the tension of the springsin said spring-rollers; a flexible blind wound on one of saidspring-rollers; a

I5 (pair of flexible bands wound on the other of saidspring-rollers; a'plate pivotally supported on the side of said frame; a pair of adjacentrollers at a suitable distance from said spring-rollers, each carrying apinion at one end, one of said rollers Vbeing supported at both ends insaid frame, land the other of said rollers being supported at one end insaid frame, and at the other end in said pivotally-supported plate: apinion supported on said plate, and adapted to mesh with the pinions onsaid rollers; means for tilting said plate whereby the pinion on theroller supported' thereby is disconnected from said intermediate pinion;a second flexible blind Wound on one of said last-mentioned rollers,andlconnected .to the bands that are Wound on one of ysaidspring-rollers; a second-pair of flexible bands wound on the other ofthe two lastmentioned rollers, and connected to the blind that is wound0n one of said spring.- rollers; means for locking against rotation thatone of said last-described rollers that is supported at both ends insaid frame; and means for releasing said last-mentioned spring-rollerfrom said locking means.

4. The combination of a frame; a pair of' adjacent spring-rollerssupported in said frame; means for adjusting the tension of the springsin said spring-rollers; a flexiblelblind wound on one of saidspring-rollers; a pair of flexible bands wound on the other of saidrollers; a pair'vof adjacent rollers at a suitable e distance from saidspring-rollers, also sup- V ,tween said last-mentioned rollers.

ported in said frame, one of said rollers carrying-a ratchet-disk; -adog pivoted on said frame; a spring adapted to actuate said-.dog in onedirection to engage said ratchet-disk; an air-engine having aplungeradapted to actuate'. said dog to release said disk; a second'flexible blind wound on one of said last-mentioned rollers, andconnected to theb'ands that are Wound on one of said spring-rollers; asecond pair of flexible bands wound on the'other of the twolast-mentioned rollers, and connectedto the blind that is wound on oneof said spring-rollers; a gearing connection between ythe last-describedrollers; and means 5. YThekombination oi a frame; apair of adjacentspringrollers supported in said Jframe; means for adjusting the tensionof the springs in said spring-rollers; av flexible blind wound on one ofsaid spring-rollers; apair of flexible. bands wound on the other of saidspring-rollers; a plate pivotally supported on the side'of said frame; apair of adjacent rolllers at a suitable distance from saidspringrollers, each carrying a pinion at one end, one of said rollersbeing supported at both ends in said frame, and carrying a ratchetdisk,and the other of said rollers being supported at one end in said frameand at the other end in said pivotally-supported plate; a pinionsupported on said plate and adapted to .mesh with the pinions on saidrollers; means for tilting said plate whereby the pinion on therollersupported thereby is disconnected from the pinion on said plate; a dogpivoted on said frame; a springadapt'ed to actuate said dog in onedirection to-engage said ratchet-disk; an air-engine having a plungeradapted to actuate said dog to release said disk; asecond flexible blindwound on one or' said last-mentioned rollers, and yconnected to 6. Thecombination of a frame, the vspringrollers 8 and 10 supported in saidframe; means for adjusting the tensioh of the springs in saidspring-rollers; the flexible blind 9 wound on said spring -rollers 10';the pair yoli' llexible bands 6 and 7 Wound on said spring-roller 8;

IOO

the plate 21 pivotally supported on said frame; f i

,the roller 13 on its shaft 16 revolubly supported at one end in saidframe, and at the other end in said plate 2l. the said shaft 16 carryingthe pinion 17; the roller 5 on .its shaft 2O revolubly supported at bothends in said frame, and carrying the pinion 19; the

pinion 18 supported on said plate 21, and adapted -to be interposedbetween said pinions 17 and 19; a spring adapted to move said plate 21in the direction to maitainengagement between the pinions 17 and 18;means for tilting the said plate whereby said last-mentioned pinions aredisengaged; a flexible blind 4 Wound on said roller 5, and connected tothe bands 6 and 7; a pair of flexible bands 11 and 12 wound on theroller 13,. and connected to the blind 9; means for locking the roller 5against rotation; and means for releasingl said roller 5 from saidlocking means; substantially as shown and described.

` 7. The combination of av frame, the spring- IIO rollers 8 and 10supportedin said frame; means I for adjusting the tension of the springsin said spring-rollers; the flexible blind^9 Wound on said spring-roller10; the llexible bands 6 and 7 wound on said spring-roller 8;'the roller13 revolubly'supported in said frame; the roller 5 revolubly supportedin said frame, and carrying the ratchet-disk 22; lthe dog 23 pi-voted ons d frame; aspringadapted to actuate said dog -in one direction toengage said ratchetdisk; the air-engine 25 having a plunger adapt- 5 edto actuate said dog 23 to release said disk; the flexible blind 4 Woundon said roller 5, andv connected to said bands 6 and 7; the bands 11,

and 12 Wound on said roller 13, and connected to said blind 9; agearingconnection between i 1o the rollers 5 and 13; and means fordisconnecting said gearing. connection between said Vrollers 5 and-13;substantially as shown and described. l W

8. The combination of a frame; the springl 5 rollers Sand 10 revolublysupported in saidv frame; means for adjusting the tension of the springsin said spring-rollers; the flexible' blind 9 Wound on said roller 10;the flexible hands 6 and 7 wound on said spring-roller 8;v

the plate 21 pivotally supported on said frame;

the roller 13 revolubly 'supported atene endv of said frame, and at theother end in said plate 21, and carrying` the pinion 17; the roller 5revolubly supported at both ends in .said

- y 25' frame, and carrying the pinion 19, and the ion 18; the dog 23pivoted on said frame; a

spring adapted toactuatc said'dog in onedirection to engageSaidratchet-disk 22; the air- .whereby said shafts are eausedfto rotatein enginey25, having a plunger'adapt'ed to ac-w 35 tuate said dog'v to'release said disk; the iexii y ble blind 4 wound on said roller 5, andconnected to the bands 6 and 7; and the flexible .bands 11 and 12 woundon saidroller 13 and f connected to the blind 9; substantially as shown4 and described. V

9. The combination of a' frame, a pair ofI adjacent shaftsrevolubly-supported therein,

each carrying a pinion; rollers revoluble upon said shafts,respectively; springs within said 45 the same direction; means forrotating one of said shafts; vand a lock adapted tofhold said shaftsagainst rotation. gv

10. The combination of a frame; a pair of shafts revol u bly supportedin said frame, each carrying a pinion;- rollers upon -said shafts,respectively; springs Within said rollers, attached at one end to vsaid`rollers and at the other to the shaft; a pinion supported on said frameand interposed between said pinions on said shafts; a head upon one ofsaid shafts'having a stop thereon; and a spring-ring attached to saidgframe and having a free end adapted to engage the stop on said head.

HARVEY W. LOCKE.v Witnesses: v f

- D. GURNEE, L. THoN.

